diff --git a/defaults/config.ini.default b/defaults/config.ini.default
index c68b3615..9b139f4d 100644
--- a/defaults/config.ini.default
+++ b/defaults/config.ini.default
@@ -18,7 +18,8 @@ uri = "ldap://identity"  ; URI of remote LDAP server
 user = "cn=admin,dc=unityhpc,dc=test"  ; Admin bind DN LDAP user
 pass = "password"  ; Admin bind password
 basedn = "dc=unityhpc,dc=test"  ; Base search DN
-user_ou = "ou=users,dc=unityhpc,dc=test"  ; User organizational unit
+user_ou = "ou=users,dc=unityhpc,dc=test"  ; User organizational unit (may contain more than user group)
+user_group = "cn=unityusers,dc=unityhpc,dc=test" ; User group
 group_ou = "ou=groups,dc=unityhpc,dc=test"  ; Group organizational unit
 pigroup_ou = "ou=pi_groups,dc=unityhpc,dc=test"  ; PI Group organizational unit
 orggroup_ou = "ou=org_groups,dc=unityhpc,dc=test"  ; ORG group organizational unit
diff --git a/resources/init.php b/resources/init.php
index 812eed42..f04625e3 100644
--- a/resources/init.php
+++ b/resources/init.php
@@ -45,6 +45,7 @@
     $CONFIG["ldap"]["pigroup_ou"],
     $CONFIG["ldap"]["orggroup_ou"],
     $CONFIG["ldap"]["admin_group"],
+    $CONFIG["ldap"]["user_group"],
     $CONFIG["ldap"]["def_user_shell"]
 );
 
diff --git a/resources/lib/UnityLDAP.php b/resources/lib/UnityLDAP.php
index 948ae86f..d9057405 100644
--- a/resources/lib/UnityLDAP.php
+++ b/resources/lib/UnityLDAP.php
@@ -53,6 +53,7 @@ public function __construct(
         $pigroup_ou,
         $orggroup_ou,
         $admin_group,
+        $user_group_dn,
         $def_user_shell
     ) {
         parent::__construct($host, $dn, $pass);
@@ -69,6 +70,7 @@ public function __construct(
         $this->pi_groupOU = $this->getEntry($pigroup_ou);
         $this->org_groupOU = $this->getEntry($orggroup_ou);
         $this->adminGroup = $this->getEntry($admin_group);
+        $this->userGroup = $this->getEntry($user_group_dn);
 
         $this->custom_mappings_path = $custom_user_mappings;
 
@@ -103,6 +105,11 @@ public function getAdminGroup()
         return $this->adminGroup;
     }
 
+    public function getUserGroup()
+    {
+        return $this->userGroup;
+    }
+
     public function getDefUserShell()
     {
         return $this->def_user_shell;
@@ -236,10 +243,10 @@ public function getAllUsers($UnitySQL, $UnityMailer, $UnityRedis, $UnityWebhook,
             }
         }
 
-        $users = $this->userOU->getChildren(true);
-
+        $users = $this->userGroup->getAttribute("memberuid");
+        sort($users);
         foreach ($users as $user) {
-            $params = array($user->getAttribute("cn")[0], $this, $UnitySQL, $UnityMailer, $UnityRedis, $UnityWebhook);
+            $params = array($user, $this, $UnitySQL, $UnityMailer, $UnityRedis, $UnityWebhook);
             array_push($out, new UnityUser(...$params));
         }
 
diff --git a/resources/lib/UnityUser.php b/resources/lib/UnityUser.php
index f02f85d7..4172ef41 100644
--- a/resources/lib/UnityUser.php
+++ b/resources/lib/UnityUser.php
@@ -106,6 +106,10 @@ public function init($send_mail = true)
             $orgEntry->addUser($this);
         }
 
+        // add to user group as well as user OU
+        $this->LDAP->getUserGroup()->appendAttribute("memberuid", $this->getUID());
+        $this->LDAP->getUserGroup()->write();
+
         // add user to cache
         $this->REDIS->appendCacheArray("sorted_users", "", $this->getUID());
 
diff --git a/tools/docker-dev/identity/bootstrap.ldif b/tools/docker-dev/identity/bootstrap.ldif
index 7e555458..b85d0141 100644
--- a/tools/docker-dev/identity/bootstrap.ldif
+++ b/tools/docker-dev/identity/bootstrap.ldif
@@ -36,6 +36,1317 @@ objectclass: organizationalUnit
 objectclass: top
 ou: groups
 
+dn: cn=unityusers,dc=unityhpc,dc=test
+cn: unityusers
+gidnumber: 501
+objectclass: posixGroup
+objectclass: top
+memberuid: user1_org1_test
+memberuid: user2_org1_test
+memberuid: user3_org1_test
+memberuid: user4_org1_test
+memberuid: user5_org2_test
+memberuid: user6_org1_test
+memberuid: user7_org1_test
+memberuid: user8_org1_test
+memberuid: user9_org3_test
+memberuid: user10_org1_test
+memberuid: user11_org1_test
+memberuid: user12_org1_test
+memberuid: user13_org1_test
+memberuid: user14_org3_test
+memberuid: user15_org3_test
+memberuid: user16_org1_test
+memberuid: user17_org1_test
+memberuid: user18_org1_test
+memberuid: user19_org1_test
+memberuid: user20_org3_test
+memberuid: user21_org1_test
+memberuid: user22_org1_test
+memberuid: user23_org1_test
+memberuid: user24_org2_test
+memberuid: user25_org1_test
+memberuid: user26_org1_test
+memberuid: user27_org1_test
+memberuid: user28_org1_test
+memberuid: user29_org1_test
+memberuid: user30_org1_test
+memberuid: user31_org1_test
+memberuid: user32_org1_test
+memberuid: user33_org3_test
+memberuid: user34_org1_test
+memberuid: user35_org1_test
+memberuid: user36_org2_test
+memberuid: user37_org1_test
+memberuid: user38_org1_test
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